Portable stove



May 3, 1949. B. w. TULLIS 2,469,135

PORTABLE STOVE Filed April 18, 1946 2 Shets-Sheet 2 INVENTOR. Boyd 14?;T////l$ ATTORNEYS Patented May 3, 1949 OFFICE PORTABLE STOVE Boyd W.Tullis, Wichita, Kans., assignor to The Coleman Company, Inc., Wichita,Kans., a corporation of Kansas Application April 18, 1946, Serial N0.663,025

4 Claims. 1

This invention relates to portable stoves of the type disclosed inPatent No. 2,397,766, issued to me on April 2, 1946, the presentinvention being directed to a stove of improved structure.

The principal objects of the present invention are to provide a stovehaving fewer number of parts that are of stronger and lighter weightconstruction and which are easier to manufacture and assemble inquantity production.

Other objects of the invention are to provide a stove structure havingan improved appearance and which is adapted for better support ofthe'cooking vessels from the tank or fount of the stove.

It is also an object of the invention to provide for a better and moreconvenient arrangement of the operating parts of the stove relatively tothe grid supporting legs.

In accomplishing these and other objects of the invention hereinafterpointed out, I have provided improved structure, the preferred form ofwhich is illustrated in the accompanying drawings wherein:

Fig. 1 is a side elevational view partly in section of a stoveconstructed in accordance with the present invention.

Fig. 2 is a horizontal section on the line 2-2 of Fig. 1 particularlyillustrating relative location of the operating elements of the stove.

Fig. 3 is a section through the grid ring and 3 its supporting legs onthe line 3--3 of Fig. 4.

Fig. 4 is a perspective view of the units composing the stove shown indisassembled spaced relation to illustrate the simplicity and assemblyof the units.

Referring more in detail to the drawings:'

I designates a stove constructed in accordance with the presentinvention and which includes a fuel tank or fount 2 having a cylindricalside wall 3, an upwardly crowned top 4 and a. bottom 5, the bottom 5being preferably inset to provide an annular support or base flange 6.The crowned top 4 may be formed integrally with the side wall and mergestherewith on a rounding curve I so that the body of the tank is adaptedto be drawn from a single sheet of material. The top 4 is provided atsubstantially equally spaced points within the circumference thereofwith depressions 8, 9, m and H so as to provide substantially horizontalfooting portions l2 for attachment of substantially cylindrical lugs 5-3having flat upper faces [4 preferably located slightly above the apicalportion of the crown as best shown in Fig. 1. The lugs [3 are secured tothe flat portions of the top by soldering, welding or the like toprovide anchorage for the grid supporting legs later described. Theapical portion of the crown top 4 is preferably provided with an inset l5 to form an annular corrugation encircling a bushing receiving openingIE to enhance the rigidity of the portion of the top carrying a bushingl1 and to provide a seating face for seating an annular shoulder 1'8 ofthe bushing which is secured thereto to form a leak-tight joint. Thebushing I! also includes a depending portion l9 that projects inwardlyof the tank through the opening Hi to provide a bushing of sufiicientthickness to give the number of threads 20 necessary in adequatelysealing and supporting a valve and burner unit 2|, later described.

Also formed in the top 4 intermediate the depressions 9-40 and l0ll areopenings for mounting a filler cap assembly 22 and a pump unit 23 asbest shown in Fig. 4. The valve and burner unit 2! includes a valve body24 having a tubular leg 25 provided with threads 26 on the end thereoffor engaging the threads 2B of the tank bushing previously described. Inorder to eliminate the necessity of gaskets and the like, the threadsare tapered so as to assure a positive leak-tight connection when thevalve and burner unit is mounted on the tank as later described.

The valve body also includes a laterally extending branch 27 adapted toproject within the space between the depressions 8 and H of the tank topand which carries a valve indicated by the hand wheel 23 for controllingflow of fuel through the leg portion 25 of the valve body. The branch 2!is threaded as at 29 and carries a packing nut 38 for sealing about thestem of the valve. The total length of the branch 27 and parts carriedthereby is such that the hand wheel is located within the circumferenceof the tank as shown in Fig. 2.

The valve body also includes a lateral branch 3| located above thebranch 2'! and extending at right angles thereto to mount the operatingrod 32 of a nozzle cleanout needle of the same construction as thecleanout needle mechanism disclosed in the above mentioned patent. Theoperating rod 32 thus projects in the space between the depressions 8and 9 and is of a length so that the handle portion 33 thereofterminates within the circumference of the tank as shown in Fig. 2.

The upper end of the valve body carries a nut 34 for mounting agenerator tube 35 in axial alignment with the leg 25 and which carries aburner bowl assembly 36 which includes a collar 31 having heatconductive connection with the generator tube at a point below the fuelnozzle 38 and which is directly connected with the rounded bottomportion 39 of the burner bowl 36 and which has an outwardly flaringannular wall 40 terminating in a laterally extending annular rim 4!. Theflaring wall portion 40 is shown as offset above the rounded portion ofthe burner bowl as indicated at 42 so that the bottom portion may be oi!815128130 confine a fiowof cooling air around the nozzle which isadmitted through openings 43 in the rounded portion of the burner bowl.The burner bowl carries a flame deflector 44 that is supported in spacedrelation with the flaring wall. portion 4| by arms 45. The flamedeflector is thus supported. in coaxial relation with the burner so thatthe flame is spread outwardly in impingement with the flared portion 40of the burner bowh 'I-Yh'ev wall of the burner bowl is thus heated andthe. heatisv conducted through the rounded bottom portion to the collar31 for heating the generator tube in the manner" disclosed in the abovementioned patent.

I With this structure, it is obvious that the valve, generator 35, and.burner bowl 3ir are adapted to be assembled and. mounted on the tank asa unit merely by. screwingthe leg portion 25 ofthevalve "body'24' intothe threadedf'opening of the bushing, l1 until. the threads are tightandthe valve control wheel: 28 islo'catedin properpositionbetween" thedepressions 8 and "H The stove also includes a; grid ring 46 that ispreferably of slightly smaller diameter than the side wall of the tankand which encircles the burner bowl as shown in Fig. l, the ring beingof suflicient depth so as to serve as a shield; for protecting theburner from external drafts and also to cooperate with the burner bowlin providing an annular passageway 41 for flow of sec.- ondary airaround. the burner. The grid ring is -.al'so of suflicient d'epth sothat. it projects below the air inlet. openings: of the'bowl as shown in.Fig. 1. The upper edge of the burner ring terminates in aninwardlyextending annular flange l8 that is directed. toward the extended. axisof the burner bowl and which is shaped to provide a plurality of bosses4'9having sides '5l connected in rounding curves with the. intermediateportions of the flange, outer faces 52 substantially registering withthe. circumference of the skirt por- .tion 53 of the ring andsubstantially horizontal top faces 54 as best shownin. Fig. 4. Thebosses are extremely rigid and also enhance the rigidity of the gridring, and particularly the inwardly extending flange portion 48 thereof.

Inorder to facilitate location of the grid supporting. legs 55, theskirt portion of the grid ring is preferably provided with outstruck'portions 56 that extend parallel with the axis of the ring and which areof sufficient width to form channellike seats 51 opening. inwardly fromthe innerside of the grid ring'to locate upwardly extending ends "58' onthe legs 55. The depth of the grooves are preferably such that the innerfaces of the upper portions of'the legs are. contiguous with the innersurface of the grid ring. The legs 55' are prefera- 1 lily ofchannel-shaped cross section and include web portions 59 that arecontinuations of the portions. 58 previously described and which haveinwardly extending. side 'fl'angesfill and BI extending from. a pointadjacent the lower edge 6520f the grid ring to the'lower ends of'thelegs where "they join with feet 6.3, which feet are preferably providedby turning inwardly extensions of the 'web portions 59* of the legs asbestshown in "41 The feet 63 "are preferably provided withrounded ends64 so that they substantially confirm with the shape of the lugs l3 onwhich they are seated.

In order to secure the legs to the lugs, the feet have openings 65 forpassing fastening devices such as screws 66 into threaded sockets 61 ofthe lugs as best shown in Figs. 1 and 4. The legs when thus formedprovide a very rigid, light weight construction and" facilitateattachment of the grid ring by spot welding of the skirt portion of thering to the upper portions 58 of the vlegsso: as to form a unit assemblythat is applied to the tank by sleeving it over the burner and valveassembly.

"Formed. the top portions of the respective bosses 49 are inwardlyopening slots 69 which ztenmnateshort ofi the closed outer ends to formseat-like surfaces 10 for grid fingers ll. Each grid finger includes arelatively bar-like member 12 having a wing portion I3 projecting from.the edge thereof near its -inner' endto project through the slots 69;'Ihewingsare provided with openings l3 registering-with similaropenings'lfi in the sideportions ofthe bosses for passing cotter pins orthe like 15 'whereon' the fingers are adapted to pivot from an outwardlyextending position shown in Fig. I with the edges of the fingers restingon the "seating surfaces 10" to a folded position entirely-within thebounds of the grid ring so that they are incompassed thereby when theyare folded over the burner bowl in .the same manner as the grid fingersdisclbsed'in the above mentioned patent. When in extended position, theouter ends of the fingers are cantilevered over the seating surfaces 10of thebosses to form a gridof adequate size to supportthe usual cookingutensils such. as .a frying pan, cofiee pot or the like when. the stoveis in use.

In assembling the stove. constructed as ,described, the tank or'fount,the .valve and burner bowl. and the grid with its supporting'.legs,..areassembled as complete units. The.- .pump and filler cap-are applied inproper position on the tank unit. The burner and valve unit is mountedon the tank by inserting, the. threaded leg: 25, of the valve. bodyinto. the. threaded opening. of the: bushing. i]- so that it may beturned therein until the. threadsv are. tight. when. the operatingwheel; 2a of. the. valve. is located intermediate the position of thedepressions .8: and ti The grid and leg unit is then inserted over. theburner'bowl 40 so: that. the=feet63 of the legs 55 rest upon theirrespective. lugs 1-3 after which the fastening devices are insertedandturned-into the sockets-61 of the lu-gssothat theheads thereof. draw:the feet'oi thelegs into firm contact with the lugs-so as to complete.the assembly;

When the partsare assembled, it is apparent that the legs of thegridringunit form openings 16, [1, 1'8 and 1e tor individual access to. thevalve wheel, the. cleanout needle. lever, the filler cap, and. the pump,theopenings being, of suificient size to allowready manipulation of therespective parts even: when the operating parts are manipulated withgloves on the hand of the operatoras when the stoveis used during coldweatheror in cold-climates.

From the foregoing it is obvious that I-haize provided a portable stovethat is- 'of extremely simple and compact construction. which.is'composed offew parts/and which is adapted to-he readily assembled sothat. "the stove may be prodnoedin: quantity production. and. at.-relatively *low' cost witlr'a nminimunr of skilled labor.

What I claim and desire to secure by Letters Patent is:

1. A stove of the character described including a cylindrical fount, avalve and burner unit hav ing a tubular leg mounted on the upper end ofthe fount substantially in the axial center thereof, a plurality of lugshaving threaded sockets and fixed to said top in a circular series aboutthe leg of the valve unit, a grid ring encircling the burner of saidunit and having an annular 1 depending skirt substantially conforming tothe diameter of the fount, legs fixed to the skirt of the grid ring incorresponding relation to the spacing of said lugs and having inturnedapertured feet on the lower ends seated on the lugs with the aperturesin registry with the sockets, and. fastening devices extending throughthe apertured feet and into the threaded sockets of the lugs forsecuring the feet to said lugs and to anchor the grid ring on the fount.

2. A stove of the character described including a cylindrical fount, avalve and burner unit having a tubular leg mounted on the upper end ofthe fount substantially in the axial center thereof, a plurality of lugshaving threaded sockets and fixed to said top in a circular series aboutthe leg of the valve unit, a grid ring encircling the burner and havingan annular depending skirt provided with channel-like seats extending inthe axial direction of the grid ring, legs having ,9

upper ends fixed within said channel-like seats and having inturnedapertured foot portions registering with the threaded sockets of saidlugs, and fastening devices extending through the apertures of the footportions and into the threaded sockets of said lugs.

3. A stove of the character described including a cylindrical fount, avalve and burner unit having a tubular leg mounted on the upper end ofthe fount substantially in the axial center thereof and provided with anoperating member and nozzle cleanout means having an operating memberarranged at right angles to the valve operating member, lugs havingthreaded sockets and fixed to said top at substantially 90 apart withone of the lugs intermediate the operating members, a filler cap and apump located in said top in diametrical registry with said operatingmembers whereby said filler cap and pump are positioned in spacesbetween other of the lugs, a grid ring encircling the burner of saidunit and having an annular depending skirt substantially c0nforming tothe diameter of the fount, legs fixed to the skirt of the grid ring iscorresponding relation to the spacing of said lugs and having inturnedapertured feet on the lower ends seated on the lugs with; the aperturesin registry with the sockets, and fastening devices extending throughthe apertured feet and into the threaded sockets of the lugs forsecuring the feet to said legs and to anchor the grid ring on the fount,said legs forming the sides of individual operating spaces for thefiller cap, pump and both operating members respectively.

4. A stove of the character described including a cylindrical fount, avalve and burner unit having a tubular leg mounted on the upper end ofthe fount substantially in the axial center thereof, and provided withan operating member and nozzle cleanout means having an operating memberat substantially right angles to the operating member of the valve unit,lugs having threaded sockets and fixed to said top at substantially 90apart with one of the lugs being located between said operating means, afiller cap and a pump located in said top in diametrical registry withthe operating members whereby said filler cap and pump are located inspaces between other of the lugs, a grid ring encircling the burner andhaving an annular depending skirt provided with offset portions formingchannel-like seats extending in the axial direction of the grid ring,legs having upper ends fixed in said channellike seats and havinginturned apertured foot portions registering with the threaded socketsof said lugs, and fastening devices extending through the apertures ofthe foot portions and into the threaded sockets of said lugs, said legsforming the sides of individual operating spaces for the filler cap,pump and both operating members respectively.

BOYD W. TULLIS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

